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.5em plus1ex minus.2ex-.5emReducing Memory and Time Complexity. Using ViT as a backbone in Mask R-CNN introduces memory and runtime challenges. Each self-attention operation in ViT takes \(O(h^2w^2)\)  space and time for an image tiled (or “patchified”) into \(h \times w\)  non-overlapping patches [1]}.
